Grinding-plate.



G. G. BARKER.

GRINDINGVPLATE.

APPLICATION FILED MAY s. I9I5.

1,169,228, Patented Jan. 25, 1916.

Ian

YH I,

n N l I l l l l I l/ I I -v N l I l N @q1/manto@ -UNI'iED STATES ATEN .s

GEORGE G. BARKER, F SPRINGFIELD, OHIO, ASSIGrNOR TO THE BAUER BROTHERS COMPANY, OF SPRINGFIELD, OHIO, A CORPORATION OF OHIO.

GRIINDING-PLATE.

To all whom z't'may concern:

Be it known that I, GEORGE G. BAigKER, a

citizen ofthe United States,.residingat Springfield, in the county of Clark and State of Ohio, have invented certain new and useful Improvements in- Grinding-Plates, of

" which the following is a specification.

My invention relates to improvements in grinding plates for. grinding machinery.

The object of the invention is to provide improved and effective means for retarding the material in its passage from the inlet to the point of discharge so as to insure a thorough vgrinding of the same.

In the accompanying drawings Figure 1 is a side view of the grinding face of a plate embodying my improvements. Fig. 2 is a section on the line 2 2 of Fig. A1.

Like parts are represented by similar characters of reference in the several views.

In the said drawings, 1 represents a plate having a central opening 2 to receive the material to be ground. AlAs shown in Fig. 2, the base of the plate is tapered from the opening v2 to a point near the outer periphery thereof so that it and theopposing plate will form a vgradually decreasing space 3 from the centers of the plates to that point.

From that point-to the extreme outer periphery the base is tapered at a more pronouncedangle, as indicated 'at l so that the extreme outer periphery of the opposing plates will be brought together so as to leave but a comparatively small space Ybetween the same. Thisconstruction acts to assist in holding back the material and prevents its discharge until it has been reduced to the proper neness and atthe same time allows suiicient space between the'plates to obtain the most desirable grinding action. The base of the plate is provided with a series of curvilinear ,ribs 4,v these 'ribs being of different lengths. These ribs are preferably formed upon arcs of circles the'centers of which are equi-distant from the center of the plate, so that the ribs will be preferably of uniform curvature, and the arc centers are also preferably of uniform distances,

Specification of Letters Patent.

the tapered space 3 and that itwill be necessary for the ground material, as it is thrown by centrifugal force toward the outer periphery of the plate, to pass between adjacent ribs, which form passageways or Patented Jan. 25, 1916. Application led May 6 1915. Serial No. 26,362.

channels. Inorder to retard the passage of the material to an extent which will insure the proper grinding thereof, there isprovided in the passages vthus formed a series of auxiliary ribs 5. These auxiliary ribs are so disposed relatively to the main ribsthatV they will form an obtuse angle4 with any radius line drawn through the center of the plate, thusy preventing `the formation of pockets on the inner sides of these auxiliary ribs into which the material might collect.

In operation, the ground material will lbe 'drawn by centrifugal force into the tapered channels between the main ribs 4.. The curved formv of these tapered channels assisted by theretarding ribs has a tendency to hold back the material, until by the'ltime it is discharged at the outer periphery of the plates it will be ina thoroughly ground condition.

Having thus described my invention, I claim e 1. Ina grinding plate, a series of curved ribs on said plate, anda series of auxiliary ribs extending from one side only of each of said curved-ribs, each of said auxiliary ribs extending in such direction. relatively to the curved ribs as to form an obtuse angle with an intersecting radius linel on` said plate.

2. In a. grinding plate, a series of curved ribs on said plate, all of said ribs being formed upon the arcs ofcircles the centers of which are substantially equi-distant from one point on said plate, and a series of auxiliary ribs von `one side only of each of said curved ribs, each of said auxiliary ribs extending in such direction relatively to its curved rib as to forman obtuse angle with an intersecting radius line of said plate.

In testimony whereof, I have hereunto set my hand this 23rd day of April, 1915.

GEORGE G. BARKE'R.

Witness CHAS. I. WELCH. 

